Chrysanthemum plant named &#39;jmay03&#39;

ABSTRACT

A new and distinct  Chrysanthemum  plant cultivar is disclosed, characterized by having large daisy-form flowers with golden yellow ray florets and very good floral longevity. The plant has strong stems and a strong, spreading growth habit and slightly sparse foliage.

LATIN NAME OF THE GENUS AND SPECIES

Chrysanthemum morifolium

VARIETY DENOMINATION

‘JMAY03’

BACKGROUND OF THE INVENTION

The new cultivar ‘JMAY03’ is a discovered natural mutation of the parentChrysanthemum plant variety ‘Pelee.’ The new cultivar was discovered ina cultivated state by James May and Gerardo Martinez in San Luis Obispo,Calif., during the month of September, 2002, and selected by GerardoMartinez in San Luis Obispo, Calif., during the month of January, 2003.

Asexual reproduction of the new cultivar ‘JMAY03’ was first performed byGerardo Martinez in October, 2002. The asexual reproduction wasperformed by terminal cuttings in a controlled environment (greenhouse)in San Luis Obispo, Calif., and has shown that the unique features ofthis cultivar are stable and reproduced true to type on successivegenerations.

SUMMARY OF THE INVENTION

The cultivar ‘JMAY03’ has not been observed under all possibleenvironmental conditions. The phenotype may vary somewhat withvariations in environment such as temperature, day length, and lightintensity, without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined tobe the unique characteristics of ‘JMAY03.’ These characteristics incombination distinguish ‘JMAY03’ as a new and distinct Chrysanthemumcultivar:

1. The flower has golden yellow ray florets.

2. The flower is a large (10-12 cm) daisy flower form.

3. The plant has a strong spreading growth habit with slightly sparsefoliage.

4. The branches have about four to six breaks per stem on a singlepinch.

5. The plant has very good floral longevity.

6. The flowers hold color well with maturity.

7. The plant vigor is excellent.

8. The plant has strong stems.

Plants of the new cultivar ‘JMAY03’ are similar to plants of the parentvariety, ‘Pelee’ (U.S. Plant Pat. No. 8,464) in most horticulturalcharacteristics, including floral form, growth habit, and plant vigor,but is distinguished from ‘Pelee’ by its pure golden yellow ray florets.Additionally, the ray florets of the new cultivar ‘JMAY03’ hold theircolor as they mature better than the ray florets of ‘Pelee.’

In comparison to the commercially available variety ‘Miramar’ (U.S.Plant Pat. No. 7,469), the new cultivar ‘JMAY03’ has a larger, goldenyellow flower with broader and more expansive ray florets. Further,plants of the new variety have a faster response time and have more opengrowth with lighter foliage color than the comparable variety. The newvariety has a longer post-production shelf life than the comparablevariety ‘Miramar.’ Further, the new variety has slightly more vigorousgrowth than the comparable variety.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photograph in

FIG. 1 illustrates in full color a typical plant of ‘JMAY03’ which wasgrown in a greenhouse. The plant was photographed eight weeks after thestart of the short-day treatment. The 6.5″ container held five cuttings.

FIG. 2 is a photograph of several leaves from the ‘JMAY03’ plant. Thecolors are as nearly true as is reasonably possible in a colorrepresentation of this type.

DETAILED BOTANICAL DESCRIPTION

In the following description, color references are made to The RoyalHorticultural Society Colour Chart except where general terms ofordinary dictionary significance are used. The following observationsand measurements describe ‘JMAY03’ that are 10 weeks old from terminalcuttings. The plants were grown in a greenhouse with bright and sunnylight conditions in San Luis Obispo, Calif., during the month of August2004. The growing temperature ranged from 65° F. to 70° F. at night to75° F. to 80° F. during the day. Measurements and numerical valuesrepresent averages of typical flowering types, and are believed to applyto plants of the variety grown under similar conditions of soil andclimate elsewhere:

-   Commercial Classification: Florist-type Chrysanthemum.

PROPAGATION

-   Time to rooting: Approximately 10 to 14 days at 72° C.-   Root description: Vigorous and well-branched.-   Root texture: Fibrous.

PLANT

-   Plant type: Herbaceous perennial.-   Growth habit: Semi-upright.-   Height: Approximately 25-35 cm as a disbud pot mum with 0-7 long    days after pinch.-   Plant spread: Approximately 40-45 cm.-   Growth rate: Approximately 3-4 cm per week after pinch.-   Branching characteristics: Alternate.-   Stem characteristics:    -   -   Lateral branch length.—Approximately 20-25 cm.        -   Lateral branch diameter.—Approximately 4-6 mm.        -   Internode length.—Approximately 1 cm to 5 cm.        -   Stem color.—Near Green 138C.        -   Stem and stem base strength.—Very strong.        -   Texture.—Pubescent.        -   Habit.—Ascending.

FOLIAGE

-   Leaf:    -   -   Arrangement.—Alternate.        -   Leaf type.—Simple.        -   Number of leaves per lateral branch.—Approximately 12-15.        -   Juvenile leaf — width.—Approximately 10-15 mm.        -   Juvenile leaf — length (excluding petiole).—Approximately            15-25 mm.        -   Mature leaf — width.—Approximately 50-70 mm.        -   Mature leaf — length (excluding petiole).—Approximately            60-80 mm.        -   Shape of blade.—Lanceolate to obovate (moderately to deeply            lobed and slightly serrate).        -   Apex.—Acute (slightly serrate).        -   Base.—Attenuate.        -   Attachment.—Attenuate to stem.        -   Margin.—Moderately to deeply lobed and slightly serrate.        -   Aspect.—Juvenile leaves slightly cupped, changing at times            to slightly recurved in mature foliage.        -   Texture of top surface.—Canescent.        -   Texture of bottom surface.—Pubescent.        -   Color.—Young foliage upper side: Near Green 139A. Young            foliage under side: Near Green 138A. Mature foliage upper            side: Near Green 141A. Mature foliage under side: Near Green            138B.        -   Venation.—Venation color upper side: Near Green 138C.            Venation color under side: Near Green 139D. Venation type:            Palmately compound.-   Petiole: None (leaf is attenuate to stem).-   Stipules:    -   -   Number per leaf.—2.        -   Color.—Near Green 141A.        -   Length.—Approximately 10 mm.        -   Width.—Approximately 8 mm.        -   Shape.—Deltoid.

BLOOM

-   Flowering stem:    -   -   Length.—At terminal end (shortest): Approximately 1 cm. At            lateral end (longest): Approximately 4 cm.        -   Angle to stem.—Approximately 10-30 degrees.        -   Strength.—Strong.        -   Color.—Near Green 138D.        -   Habit.—Erect.        -   Diameter.—Approximately 3-5 mm.        -   Surface texture.—Pubescent.-   Flower bud:    -   -   Length.—Approximately 8-10 mm.        -   Diameter.—Approximately 12-14 mm.        -   Form.—Globular.        -   Color.—Near Green 143B.        -   Rate of flower opening.—Approximately 14-21 days.-   Involucral bracts (Phyllaries):    -   -   Appearance.—Matte.        -   Texture.—Pubescent.        -   Number per flower.—Approximately 30-50.        -   Shape.—Ovate.        -   Margin.—Entire.        -   Apex.—Acute.        -   Length.—Approximately 8-10 mm.        -   Width.—Approximately 2-4 mm.        -   Color.—Upper side: Near Green 143A. Under side: Near Green            143A.-   Flower:    -   -   Flowering habit.—Twelve hours of darkness per day for 52-58            days required to develop blooms.        -   Flower form.—Flat capitulum type daisy.        -   Natural flowering season.—Fall.        -   Number of flowers per lateral branch.—Approximately 6-8.        -   Flower diameter.—Approximately 10-12 cm.        -   Flower depth.—Approximately 2-3 cm.        -   Flower longevity on plant.—Approximately 21 to 28 days.        -   Persistence.—Persistant.        -   Receptacle shape.—Rotund-dome like.        -   Disc diameter.—Approximately 2-2.5 cm.        -   Changes as the flower ages.—The flower opens with a golden            yellow color and fades only slightly as it matures. The            nearly vertical ray florets begin to reflex and move towards            horizontal as the flower matures. The disc florets mature            exposing stigmas from outer edge of disc towards the center.-   Ray florets:    -   -   Appearance.—Matte.        -   Arrangement.—Rosette.        -   Texture.—Smooth to satiny.        -   Average number per flower.—Approximately 30.        -   Shape.—Oblanceolate.        -   Aspect.—Recurving.        -   Cross section.—Concave.        -   Margin.—Entire.        -   Apex.—Acute.        -   Strength.—Strong.        -   Length.—Approximately 6 cm.        -   Width.—Approximately 2 cm.        -   Length of corolla tube.—Approximately 2-3 mm.        -   Color.—Upper surface at first opening: Near Yellow 9A. Upper            surface at maturity: Near Yellow 9A. Upper surface at            fading: Near Yellow 9B. Under surface at first opening: Near            Yellow 7C. Under surface at maturity: Near Yellow 7D. Under            surface at fading: Near Yellow 7D.-   Disc florets:    -   -   Appearance.—Matte.        -   Texture.—Waxy.        -   Average number of florets per disc.—Approximately 200-250.        -   Shape.—Rounded.        -   Apex.—Syngenesious.        -   Average length.—Approximately 4-5 mm.        -   Average width.—Approximately 1 mm.        -   Color.—At first opening: Near Yellow-green 151B. At            maturity: Near Yellow-orange 14B. At fading: Near            Yellow-green 153D.

REPRODUCTIVE ORGANS

-   Ray florets:    -   -   Number of pistils per floret.—1.        -   Stigma shape.—2-Branched.        -   Stigma color.—Near Yellow 13B.        -   Style color.—Near Green-yellow 1C.        -   Style length.—Approximately 6-7 mm.        -   Stamens.—Absent.-   Disc florets:    -   -   Number of pistils per floret.—1.        -   Stigma shape.—2-branched.        -   Stigma color.—Near Yellow 7A.        -   Style length.—Approximately 5 mm.        -   Style color.—Near Green-yellow 1A.        -   Number of stamens per floret.—5.        -   Anther shape.—Syngenesious.        -   Anther color.—Near Yellow 7A.        -   Pollen color.—Near Yellow 7A.        -   Pollen quantity: Low.

OTHER CHARACTERISTICS

-   Seed production: Seeds are not produced in this variety.-   Disease resistance: Very good to excellent resistance to most common    chrysanthemum diseases.-   Pest resistance: The plant is susceptible to most common greenhouse    pests.-   Drought tolerance and cold tolerance: This variety is not drought or    cold tolerant.

1. A new and distinct cultivar of Chrysanthemum plant as hereinillustrated and described.